Charlotte, N.C. Mayor Anthony Foxx speaks in the East Room of the White House in Washington, Monday, April 29, 2013, after President Barack Obama announced Foxx' nomination to succeed Ray LaHood as the next transportation secretary. (AP Photo/Jacquelyn Martin)

President Barack Obama looks toward Charlotte, N.C., Mayor Anthony Foxx, left, in the East Room of the White House in Washington, Monday, April 29, 2013, where he announced he would nominate Foxx to succeed Ray LaHood, center, as transportation secretary. (AP Photo/Pablo Martinez Monsivais)